2640640450 has 96 divisors (see below), whose sum is σ = 5828198400. Its totient is φ = 871041600.

The previous prime is 2640640441. The next prime is 2640640469. The reversal of 2640640450 is 540460462.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2158539 + ... + 2159761.

It is an arithmetic number, because the mean of its divisors is an integer number (60710400).

Almost surely, 2^2640640450 is an apocalyptic number.

2640640450 is an abundant number, since it is smaller than the sum of its proper divisors (3187557950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2640640450 is a wasteful number, since it uses less digits than its factorization.

2640640450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472 (or 1467 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 2640640450 is about 51387.1623073312. The cubic root of 2640640450 is about 1382.1963991011.

The spelling of 2640640450 in words is "two billion, six hundred forty million, six hundred forty thousand, four hundred fifty".